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Chrysler developed its first experimental hemi engine for the Republic P-47 Thunderbolt fighter aircraft. The XIV-2220 was an inverted V16 rated at 2,500 hp (1,860 kW). The P-47 was already in production with a Pratt & Whitney radial engine when the XIV-2220 flew successfully in trials in 1945 as a possible upgrade, but the war was winding down and it did not go into production.
The Chrysler B and RB engines are a series of big-block V8 gasoline engines introduced in 1958 to replace the Chrysler FirePower (first generation Hemi) engines. The B and RB engines are often referred to as "wedge" engines because they use wedge-shaped combustion chambers; this differentiates them from Chrysler's 426 Hemi big block engines that are typically referred to as "Hemi" or "426 Hemi ...
Chrysler used a 14 mm (0.55 in) spark plug, rather than the typical 18 mm (0.71 in), in an effort to fit it as centrally as possible in the combustion chamber. [1] The intake and exhaust valves were the same size as the 426's, [6] the 2.25 in (57 mm) intake canted at 15° from the bore centerline, the 1.94 in (49 mm) exhaust at 6°. [6]
In 1958, Chrysler introduced its new wedge-head B Block engine, which was implemented in the Dodge and DeSoto lines. The following year saw the introduction of the RB Block in Chryslers and Imperials ; this was a modified B Block with a raised deck resulting in an increase of stroke from 3.18 inches to 3.75 inches.
Tom Hoover was the leading engineer of the Chrysler 426 Hemi engine.. Tom Hoover's development of the first trademarked Hemi engine through Chrysler Corporation was a major success for the brand through the mid to late 1960s and early 1970s.
In 1971, compression ratios were reduced in performance engines, except the 426 cu in and the high-performance 440 cu in, to accommodate regular gasoline. 1971 was the last year for the 426 Hemi. Chrysler had plans to continue the 1970 Dodge Challenger T/A for 1971, even publishing advertisements for a 1971 Dodge Challenger T/A.
It continued to offer a Chrysler engine vibration isolation feature called "Floating Power" and was one of the first automobiles to offer a one piece curved windshield. [5] Chrysler offered both the conventional Airstream models along with the Airflow models under the "Chrysler" marque but only offered the "Imperial" marque with Airflow models. [5]
This engine family was Chrysler's first 60° V6 engine designed and built in-house for front wheel drive vehicles, and their first V6 not based on a V8. It was designed as a larger, more powerful alternative to the Mitsubishi 3.0 V6 in the minivans and debuted in 1989 for the 1990 model year.